D defs.my
Entry 1 sense Webster, 1913

Breakwater

/brāk'-wôtˌ-ẽr/ · Break·wa·ter · IPA /ˈbɹeɪkˌwɔːtə/
01 n. Any structure or contrivance, as a mole, or a wall at the mouth of a harbor, to break the force of waves, and afford protection from their …
  1. 1.
    Any structure or contrivance, as a mole, or a wall at the mouth of a harbor, to break the force of waves, and afford protection from their violence.